NYC-WTC_000189348

NYC 9/11 Public Portal Document

Attn Mr Bernard Orlan Received 4/18/02 9 30 00 PM NYC Board of Education ATC Group # 7459 28 11 Queens Plaza North Analysis Date 4/18/02 Long Island City NY 11101 Fax (212) 475 4122 Phone (212)477 8941 Project H S for Leadership & Public Service

Asbestos Fiber Analysis by Transmission Electron Microscopy (TEM) Performed by EPA 40 CFR Part 763 Final Rule (AHERA) Analytical Asbestos Area Non Asbestos # Structures Sensitivity Concentration Sample f^olume Analyzed Asb Type(s) 0 5^ 5 5ft (S/cc) (S/mm^) (S/cc) Notes

20 1808 00 0 0450 0 None Detected 0 0 0 0047 <22 24 <0 0047 7459 17

21 1808 00 0 0450 0 None Detected 0 0 0 0047 <22 24 <0 0047 7459 IS

MARK PEYSAKHOV MICHAEL A GORYCKI Ph D

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Disclaimer The laboratory is not responsible tor data reported in structures/cc which is dependent on volume collected by non laboratory personnel ThlSlab is only responsible for data reported in structures/mm This report may not be reproduced except in full without wntten approval by ATC Assoaates Inc This report may not be used to claim product endorsement by NVLAP or any other agency of the U S Government This reports relates only to the samples reported above Quality control data (including 95 / confidence limits and laboratory and analysis accuracy and precision) is available upon request

Accredited for NVLAP PLM/TEM #101187 0 NY State ELAP #10879

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CITY_21MC100_003086075

NYC-WTC_000189350